Regarding Wraithblades and rerolls, surely someone has to go... hmm no thats a stupid number of dice rolls for a single unit to be making...
Really? Have you never played against an Ork or Tyranid army?
Also keep in mind this is on a very expensive full 10-man squad who was mostly point-costed out of being used. They're also going to be on foot and assuming they made their charge. Surely a good opponent will kill at least a few as they walk up the board and probably deny them the charge (for a loss of attacks).
Not that bad at all.
In addition to Eldar, I also run an army of Orkz. A typical unit I might run would be:
30 Ork Boyz - 1 is Boss Nob with Big Choppa + Shoota, 3 have Rokkit Launchas, 26 have Shootas - 225 pts
1 Weirdboy with Da Jump - 62
Assuming I send this squad in using a weirdboy, it will put out 27x2 Shoota Shots, 3 Rokkit shots, then charge and 50% of the time make it in to make 87 regular Ork Boy attacks and 4 Big Choppa attacks. This requires about 290 points to make this happen. However, since this is a mass of S4 attacks, it doesn't really compare to the Wraithblades that well.
You could also do this with a squad of 10 Nobs with Big Choppas, and 2 Weirdboys, one casting Warpath, which will put out 40 Big Choppa Attacks for about 375 points total.
The article suggests a Spiritseer using Psytronome Warlord power, Guided Wraithsight Strategem on the Wraithblades, and Empower Psyker Power with a 10-strong Wraithblade (with axes) unit to put out 60 attacks. Total cost is about 550, plus a one-shot Warlord Trait, plus a CP. It's definitely a lot more expensive.
I would be pretty hesitant to make a 500 pts investment like this. But it could work.